HRTEM observation of the monoclinic-to-tetragonal (m-t) phase transition in nanocrystalline ZrO₂

摘要

The orientation relations m(100) || t(001), m[001] || t[110]; m(011) || t(100), m[001] || t[110]; m(100) || t(110), m[001] || t[001]; m(013) || t(116), m[001] || t[001]; (indices for the primitive tetragonal cell) have been found between the tetragonal (t) and monoclinic (m) domains during the electron irradiation-induced m-t phase transition observed in-situ with HREM within isolated zirconia nanoparticles. Geometric models of the m-t interfaces are proposed. Keywords High-resolution transmission electron microscopy, nanoparticles, orientation relations, polymorphism, zirconia, catalyst